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{"save":1,"level":1,"time":"15","total":10,"point":5,"segment":[{"id":"9944","test_id":"676","question":"<p>Cho các phát bi\u1ec3u sau.<\/p><p>(1) T\u1ed5ng s\u1ed1 \u0111o hai góc k\u1ec1 nhau b\u1eb1ng 180<sup>o<\/sup>.<\/p><p>(2) Hai góc b\u1eb1ng nhau thì \u0111\u1ed1i \u0111\u1ec9nh.<\/p><p>(3) Hai \u0111\u01b0\u1eddng th\u1eb3ng song song thì c\u1eaft nhau.<\/p><p>(4) Hai góc k\u1ec1 bù có t\u1ed5ng s\u1ed1 \u0111o b\u1eb1ng 180<sup>o<\/sup>.<\/p><p>(5) N\u1ebfu NH = NK thì N là trung \u0111i\u1ec3m c\u1ee7a HK.<\/p><p>Có bao nhiêu phát bi\u1ec3u <strong>\u0111úng<\/strong>?<\/p>","options":["<strong>A.<\/strong> 1","<strong>B.<\/strong> 2","<strong>C.<\/strong> 3","<strong>D.<\/strong> 5"],"correct":"1","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 1.<\/span><\/p><p>(1) T\u1ed5ng s\u1ed1 \u0111o hai góc k\u1ec1 nhau b\u1eb1ng 180<sup>o<\/sup> (<span style=\"color:#c0392b;\">sai<\/span>, \u0111ây là tính ch\u1ea5t c\u1ee7a hai góc bù nhau, không ph\u1ea3i c\u1ee7a hai góc k\u1ec1 nhau).<\/p><p>(2) Hai góc b\u1eb1ng nhau thì \u0111\u1ed1i \u0111\u1ec9nh (<span style=\"color:#c0392b;\">sai<\/span>, hai góc \u0111\u1ed1i \u0111\u1ec9nh thì ch\u1eafc ch\u1eafn b\u1eb1ng nhau nh\u01b0ng \u0111i\u1ec1u ng\u01b0\u1ee3c l\u1ea1i không \u0111úng, xem hình v\u1ebd).<\/p><p><img alt=\"30 B\u00e0i t\u1eadp t\u1ed5ng h\u1ee3p To\u00e1n 7 Ch\u01b0\u01a1ng 3 K\u1ebft n\u1ed1i tri th\u1ee9c c\u00f3 l\u1eddi gi\u1ea3i\" src=\"https:\/\/vietjack.com\/toan-7-kn\/images\/trac-nghiem-bai-tap-cuoi-chuong-3-151745.PNG\" \/><\/p><p>(3) Hai \u0111\u01b0\u1eddng th\u1eb3ng song song thì c\u1eaft nhau (<span style=\"color:#c0392b;\">sai<\/span>, hai \u0111\u01b0\u1eddng th\u1eb3ng song song không có \u0111i\u1ec3m chung nên không th\u1ec3 c\u1eaft nhau).<\/p><p>(4) Hai góc k\u1ec1 bù có t\u1ed5ng s\u1ed1 \u0111o b\u1eb1ng 180<sup>o<\/sup>. (<span style=\"color:#16a085;\">\u0111úng<\/span>)<\/p><p>(5) N\u1ebfu NH = NK thì N là trung \u0111i\u1ec3m c\u1ee7a HK (<span style=\"color:#c0392b;\">sai<\/span>, n\u1ebfu N là trung \u0111i\u1ec3m c\u1ee7a HK thì ch\u1eafc ch\u1eafn NH = NK, còn \u0111i\u1ec1u ng\u01b0\u1ee3c l\u1ea1i không \u0111úng vì c\u1ea7n thêm \u0111i\u1ec1u ki\u1ec7n ba \u0111i\u1ec3m \u0111ó th\u1eb3ng hàng, xem hình v\u1ebd).<\/p><p><img alt=\"30 B\u00e0i t\u1eadp t\u1ed5ng h\u1ee3p To\u00e1n 7 Ch\u01b0\u01a1ng 3 K\u1ebft n\u1ed1i tri th\u1ee9c c\u00f3 l\u1eddi gi\u1ea3i\" src=\"https:\/\/vietjack.com\/toan-7-kn\/images\/trac-nghiem-bai-tap-cuoi-chuong-3-151744.PNG\" \/><\/p><p>V\u1eady ch\u1ec9 có <span style=\"color:#16a085;\"><strong>1<\/strong><\/span> phát bi\u1ec3u \u0111úng.<\/p>","type":"choose","user_id":"126","test":"2","date":"2025-08-02 18:11:50"},{"id":"9945","test_id":"676","question":"<p>Cho ba \u0111\u01b0\u1eddng th\u1eb3ng phân bi\u1ec7t a, b và c, bi\u1ebft c \/\/ a và c \/\/ b. K\u1ebft lu\u1eadn nào \u0111úng?<\/p>","options":["<strong>A.<\/strong> a \/\/ b","<strong>B.<\/strong> b ⊥ c ","<strong>C.<\/strong> a ⊥ b"],"correct":"1","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> a \/\/ b.<\/span><\/p><p>N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng phân bi\u1ec7t cùng song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba thì chúng song song v\u1edbi nhau.<\/p><p>Vì a \/\/ c và b \/\/ c nên a \/\/ b.<\/p>","type":"choose","user_id":"126","test":"1","date":"2025-08-02 18:14:36"}]}